公开(公告)号：US20220022158A1

公开(公告)日：2022-01-20

申请号：US17370544

申请日：2021-07-08

Applicant: KEYVAN ZARIFI ,  NAVID TADAYON ,  ALIREZA BAYESTEH

Inventor： KEYVAN ZARIFI ,  NAVID TADAYON ,  ALIREZA BAYESTEH

IPC: H04W64/00 ,  H04W24/10 ,  H04W8/24 ,  H04L5/00

Abstract: Methods and devices utilizing downlink channel measurements for customization of downlink positioning reference signals (DL PRs) are provided. A serving base station (BS) for a targeted device and one or more non-serving BSs transmit respective downlink reference signals (DL RSs) to the targeted device. The targeted device reports respective downlink channel measurement information for each BS based on the received DL RSs. The BSs each transmit a respective DL PRS to the targeted device for downlink positioning measurement, wherein the respective DL PRS for each BS is configured based in part on the respective downlink channel measurement information reported by the targeted device for that BS. This allows the DL PRS for each BS to be configured taking into account downlink channel conditions between the BS and the targeted device, which can potentially improve positioning measurement accuracy by improving reception of the DL PRS at the targeted device.

公开(公告)号：US20210302561A1

公开(公告)日：2021-09-30

申请号：US16835852

申请日：2020-03-31

Applicant: ALIREZA BAYESTEH ,  KEYVAN ZARIFI ,  MOHAMMADHADI BALIGH ,  NAVID TADAYON

Inventor： ALIREZA BAYESTEH ,  KEYVAN ZARIFI ,  MOHAMMADHADI BALIGH ,  NAVID TADAYON

IPC: G01S13/42

Abstract: Methods and apparatus are provided that may simplify and enhance the location of nodes in a network, including ED and mobile TPs, even if all or many of the nodes are mobile. The methods may be used to enable single TP positioning, and may be used to reduce synchronization error. The provided methods make use of smart reflectors having known location. By processing a combination of signals, which may include an original transmitted signal, and/or one or more reflected signals, the location of a receiving node can be determined. Media tagging may be employed to allow a receiver to detect the identity of the nearby reflectors (with known locations) and based on the identity determine the locations of the reflectors. Using this information, the receiving node can detect its location regardless of knowing the transmission source and/or location.

公开(公告)号：US10820353B2

公开(公告)日：2020-10-27

申请号：US16100125

申请日：2018-08-09

Applicant: Yicheng Lin ,  Keyvan Zarifi ,  Mohammadhadi Baligh

Inventor： Yicheng Lin ,  Keyvan Zarifi ,  Mohammadhadi Baligh

IPC: H04W40/00 ,  H04W74/08 ,  H04J13/14 ,  H04L5/00 ,  H04J13/00

Abstract: Systems and methods are provided for transmit signalling to configure a UE with a UE specific root to use in generating a Zhadoff Chu (ZC) sequence for reference signal transmission. With conventional LTE, a cell specific root is used within each cell. There is a need for a more flexible association between roots and UEs that, for example, allows for multiple roots to be associated with a cell. The provided approach may help with maintaining re-use distance as networks become denser. The method provided in this embodiment improves the capabilities of automatic driving and ADAS of electric vehicles. The method can be applied to vehicle networking, such as V2X, LTE-V, V2X, etc.

公开(公告)号：US20200221405A1

公开(公告)日：2020-07-09

申请号：US16731347

申请日：2019-12-31

Applicant: KEYVAN ZARIFI

Inventor： KEYVAN ZARIFI

IPC: H04W56/00 ,  H04W72/00 ,  H04L5/00 ,  H04W52/24 ,  H04W52/32

Abstract: Aspects of the present application provide methods and devices in a communication network that aid in implementing sounding reference signal (SRS) measurement by multiple cells (i.e. serving cells and non-serving cells, also known as “neighbor cells”) as well as NR LMUs. This enhanced SRS measurement based on multiple cell and/or NR LMU measurements may facilitate more beneficial usages such as UL-based positioning and UL-based mobility.

公开(公告)号：US10491439B2

公开(公告)日：2019-11-26

申请号：US15801177

申请日：2017-11-01

Applicant: Keyvan Zarifi ,  Mohammadhadi Baligh ,  Usa Vilaipornsawai

Inventor： Keyvan Zarifi ,  Mohammadhadi Baligh ,  Usa Vilaipornsawai

IPC: H04W4/00 ,  H04L27/26 ,  H04J13/00 ,  H04L5/00 ,  H04W72/04

Abstract: Methods and devices for configurable sequence usage for user equipment (UE) uplink reference signaling are provided. In one provided method, a transmission reception point (TRP) in a wireless communication network receives a first UL reference signal (RS) associated with a first UL RS sequence from a first UE and receives a second UL RS associated with a second UL RS sequence from a second UE, the first and second UL RS sequences being non-orthogonal. In another provided method, A UE determines an UL RS sequence based on a UL RS sequence root, the UL RS sequence root being a UE-specific root and being independent of a cell identifier of a cell serving the UE. The UE sends an UL RS associated with the UL RS sequence, the UL RS sequence being a Zadoff-Chu sequence.

公开(公告)号：US10333688B2

公开(公告)日：2019-06-25

申请号：US15656860

申请日：2017-07-21

Applicant: Keyvan Zarifi ,  Mohammadhadi Baligh ,  Jianglei Ma

Inventor： Keyvan Zarifi ,  Mohammadhadi Baligh ,  Jianglei Ma

IPC: H04L5/14 ,  H04W28/02 ,  H04W40/24 ,  H04W72/04 ,  H04W74/00 ,  H04W88/02 ,  H04W88/06 ,  H04W72/02 ,  H04W72/08

Abstract: A processing system for simultaneous bidirectional transmissions, the processing system comprising a non-transitory memory storage comprising instructions and one or more processors in communication with the memory, wherein the one or more processors execute the instructions to: determine first transmission time slots for downlink (DL) and uplink (UL) transmissions for a first plurality of user equipment (UEs); assign a DL transmission to a first shared time slot of said first transmission time slots for a first UE in said first plurality of UEs; and assign an UL transmission to said first shared time slot for a second UE in said first plurality of UEs.

公开(公告)号：US20180367358A1

公开(公告)日：2018-12-20

申请号：US15802326

申请日：2017-11-02

Applicant: MOHAMMADHADI BALIGH ,  KELVIN KAR KIN AU ,  AMINE MAAREF ,  KEYVAN ZARIFI ,  YICHENG LIN

Inventor： MOHAMMADHADI BALIGH ,  KELVIN KAR KIN AU ,  AMINE MAAREF ,  KEYVAN ZARIFI ,  YICHENG LIN

IPC: H04L27/26 ,  H04L5/00 ,  H04W72/04 ,  H04B7/06

Abstract: Systems and methods for reference signal transmission, such as demodulation reference symbol and CSI-RS. The network transmits a reference signal scrambling ID to the UE, and both the network and the UE use this to calculate an initialization sequence for the reference signal. The, one or the other of the network and the UE transmit the reference signal. Optionally, the reference signal is based on a UE-related ID, or a combination of the UE-related ID and one or more other fields.

公开(公告)号：US20170324536A1

公开(公告)日：2017-11-09

申请号：US15656860

申请日：2017-07-21

Applicant: Keyvan Zarifi ,  Mohammadhadi Baligh ,  Jianglei Ma

Inventor： Keyvan Zarifi ,  Mohammadhadi Baligh ,  Jianglei Ma

IPC: H04L5/14 ,  H04W74/00 ,  H04W72/04 ,  H04W40/24 ,  H04W28/02 ,  H04W72/08 ,  H04W72/02 ,  H04W88/02 ,  H04W88/06

CPC classification number: H04L5/1438 ,  H04W28/0236 ,  H04W40/244 ,  H04W72/02 ,  H04W72/0446 ,  H04W72/082 ,  H04W74/002 ,  H04W88/02 ,  H04W88/06

Abstract: A processing system for simultaneous bidirectional transmissions, the processing system comprising a non-transitory memory storage comprising instructions and one or more processors in communication with the memory, wherein the one or more processors execute the instructions to: determine first transmission time slots for downlink (DL) and uplink (UL) transmissions for a first plurality of user equipment (UEs); assign a DL transmission to a first shared time slot of said first transmission time slots for a first UE in said first plurality of UEs; and assign an UL transmission to said first shared time slot for a second UE in said first plurality of UEs.

公开(公告)号：US20170195987A1

公开(公告)日：2017-07-06

申请号：US14985991

申请日：2015-12-31

Applicant: Keyvan Zarifi ,  Mohammadhadi Baligh

Inventor： Keyvan Zarifi ,  Mohammadhadi Baligh

IPC: H04W68/02 ,  H04W76/02

CPC classification number: H04W68/02 ,  H04W76/11

Abstract: A paging method and system in a wireless network for a target device that is enabled to transition between an active state and a standby state, including: tracking a location of a target device within the network while the target device is in the standby state based on a periodic identifying signal from the target device; determining a serving transmission point for the target device based on the tracking; and instructing the serving transmission point to transmit a paging message to the target device.

公开(公告)号：US20170188406A1

公开(公告)日：2017-06-29

申请号：US15459166

申请日：2017-03-15

Applicant: MOHAMMADHADI BALIGH ,  KEYVAN ZARIFI ,  JIANGLEI MA

Inventor： MOHAMMADHADI BALIGH ,  KEYVAN ZARIFI ,  JIANGLEI MA

IPC: H04W76/02 ,  H04W40/16

Abstract: A master user equipment (UE) device may coordinate device-to-device (D2D) communications amongst a plurality of UE devices. For example, a UE device, which has been designated as a master UE device, may coordinate a D2D communication between a first UE device and a second UE device. The master UE device may be a UE device that obtains an indication that it is a master UE device that is to coordinate D2D communications amongst the plurality of UE devices. In some embodiments, the coordinating the D2D communication may be on behalf of a network and/or to facilitate wireless communication between the network and at least one of the plurality of UE devices.